EP 0482845 A3 19940112 -
Publication
Application
Priority
JP 28891890 A 19901026
Abstract (en)
[origin: EP0482845A2] A digital-to-analog converting unit decodes a digital input signal into a decoded signal, and selectively allows constant-current cells (C11 to C7m) arranged in matrix to supply unit currents for producing an analog output signal, wherein a decoding circuit (12b) incorporated in the digital-to-analog converting unit sequentially selects the constant-current cells in such a manner that insufficient increment of current produced by one of the constant-current-cells (C51) cancels out excessive increment of current produced by another constant-current cell (C31) so that the analog output signal is improved in linearity. <IMAGE>
IPC 1-7
IPC 8 full level
H03M 1/74 (2006.01); H03M 1/06 (2006.01); H03M 1/68 (2006.01)
CPC (source: EP US)
H03M 1/0651 (2013.01 - EP US); H03M 1/685 (2013.01 - EP US); H03M 1/747 (2013.01 - EP US)
Citation (search report)
- [X] JP H02253719 A 19901012 - MATSUSHITA ELECTRIC IND CO LTD & PATENT ABSTRACTS OF JAPAN vol. 014, no. 580 (E - 1017) 25 December 1990 (1990-12-25)
- [A] MIKI T ET AL: "An 80 MHz 8 b CMOS D/A converter", 1986 IEEE INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE. DIGEST OF TECHNICAL PAPERS (CAT. NO.86CH2263-2), ANAHEIM, CA, USA, 19-21 FEB. 1986, 132 - 133, 325 & DE 3612693 A1 19861030 - MITSUBISHI ELECTRIC CORP [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0482845 A2 19920429; EP 0482845 A3 19940112; JP H04162830 A 19920608; US 5162800 A 19921110
DOCDB simple family (application)
EP 91309667 A 19911018; JP 28891890 A 19901026; US 77619791 A 19911015